Method of treating milk.



SAMUEL RIDGWAY KENNEDY, 0F PHILADELPHIA, PENNSYLVANIA.

METHOD OF TREATING MILK.

No Drawing.

Specification of Letters Patent.

Application filed June 1, 1906.

Patented Sept.

Serial No. 319,671.. r i

To all whom it may concern:

Be it known that SA UEL RInowAr Knxxunr, av citizen of the UnitedStates, residing at Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new'and useful improvementsin lrlilk-Products, of which the following is a specification.

My invention relates to a novel product derived from milk and to theprocess of producing the same.

It consists of a process of treating condensed milk by returningsubstantially all the sugar of milk and salts, and drying in the mannerhereinafter described, the residue. l

The 'n'ocess is as follows: The milk is condensed to about twenty oneand a half degrees Baum, then cooled preferably by passing overrefrigerating tubes, to about 33 degrees Fahrenheit. It is then allowedto stand until the sugar of milk and salts crystallize, which will beonly a short time if the cooling is done by passing over refrigeratingtubes, but somewhat longer if cooled in bulk; itis then beaten oragitated, preferably in a beating engine having paddles which lessensits viscosity, and it is then filtered, preferably in a centrifugal toremove the crystallized sugar and salts. The filtrate is a smoothcondensed milk free from grit. This smooth condensed milk, whichconsists of certain solids suspended in water, in

which-water there are probably some salts in solution, is pressed, toforce out as much of the water, with the dissolved salts. as will comeoff in that way. The partly dried mass is then desiccated onheatedrolls, after which it may be. powdered or not as preferred. In order toproduce an easily soiuble and digestible product the drying rolls shouldnot much exceed thetemperature of 140 degrees l ahrenheit.

The product resulting from thi process consists of a grayish whitesubstance, either in tlakes or powder,.which contains the ingredients ofordinary milk from which it is formed, (and which will vary slightly ofcourse with the particular inilk'useth) except that it lackssubstantially all the sugar, salts and water. it is soluble slowly incold water and in alkaline solutions and when in solution may-becoagulated by heat or acids.

What. I claim as new and desire to secure by Letters Patent is:

The process of treating milk which consists in condensing it, coolingit, causing the milk sugar and salts to crystallize, beating it toreduce the viscosity, filtering out the milk sugar and salts and dryingthe remainder.

In testimony wl'icreof l atiix my signature in presence of twowitnesses.

SAMUEL 1t] DGVAY KENNEDY.

\Vitncsses Ammn'r EUGENE TAXLon, JOHN MlLLnn.

